In a medium sized bowl, whisk together lemon juice, wine vinegar, lemon zest, olive oil, garlic, dijon, salt, and pepper.
Add red onion, and sliced fennel. A mandoline slicer is nice for slicing thin but a sharp knife works well too. Tip: if your onion is really hot let it sit in the dressing 5 minutes before adding the other ingredients.
Add the fresh herbs and white beans. Toss to thoroughly coat all ingredients.
Adjust salt to taste, adding more salt, pepper or lemon as needed.
Tip: if making this ahead, add the fresh herbs right before serving.
